hoffa disappeared more than 30 years ago. he was last seen outside of a restaurant in the spbs of detroit. police have received dozens of tips over the years. they've dug up everything from giants stadium to a backyard pool. they're hoping today will 25 them some clues. >>> four people are dead following a shooting that happened at a business in minneapolis. late last night police say that a shooter described as a disgruntled employee walked into the sign store and started shooting. four others were wounded in this, and -- none of them were critically injured in this. police say the gunman took his own life as they moved in. >>> a tragic story to tell you about this morning, this is coming out of connecticut. police say a man shot and killed a masked teenager in self-defense outside of his neighbor's house during what appeared to be an attempted burglary. he then discovered that it was his own 15-year-old son. police say that teenager was armed with a weapon. no charges right now have been filed against the father. >>> pretty